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Performance of Stone Columns in Multi-Layered Soils Under the Action of Seismic Loads
Soil liquefaction is a dangerous phenomenon that involves huge damages during strong earthquake ground motion events. Stone columns (SCs) are widely used as a liquefaction mitigation element which is expected to perform improvements against liquefaction hazard by densifying, increasing the stiffness and rapid dissipation of excess pore water pressure in the surrounding soil. Although in recent times, few studies on the behaviour of stone columns in the seismic zone have evolved, the performance of SCs in multi-layered soils is not been extensively examined. This paper presents the numerical investigations on the performance of SCs installed in multi-layered soils as a liquefaction mitigation measure against seismic loading. The acceleration time histories, Excess Porewater Pressure (EPP), vertical displacement and stress ratio were evaluated along different depths using PLAXIS 2D. With the installation of a stone column, there is a considerable reduction in the acceleration amplitude, which in turn reduces the EPP and vertical displacement at different locations and the amplitude of reduction depends on the soil stiffness levels at the depth.
Performance of Stone Columns in Multi-Layered Soils Under the Action of Seismic Loads
Soil liquefaction is a dangerous phenomenon that involves huge damages during strong earthquake ground motion events. Stone columns (SCs) are widely used as a liquefaction mitigation element which is expected to perform improvements against liquefaction hazard by densifying, increasing the stiffness and rapid dissipation of excess pore water pressure in the surrounding soil. Although in recent times, few studies on the behaviour of stone columns in the seismic zone have evolved, the performance of SCs in multi-layered soils is not been extensively examined. This paper presents the numerical investigations on the performance of SCs installed in multi-layered soils as a liquefaction mitigation measure against seismic loading. The acceleration time histories, Excess Porewater Pressure (EPP), vertical displacement and stress ratio were evaluated along different depths using PLAXIS 2D. With the installation of a stone column, there is a considerable reduction in the acceleration amplitude, which in turn reduces the EPP and vertical displacement at different locations and the amplitude of reduction depends on the soil stiffness levels at the depth.
Performance of Stone Columns in Multi-Layered Soils Under the Action of Seismic Loads
Lecture Notes in Civil Engineering
Krishna, A. Murali (editor) / Banerjee, Subhadeep (editor) / Pitchumani, N. Kumar (editor) / Kiruthika, P (author) / Krishna, A Murali (author)
DFI-India Annual Conference ; 2022 ; Tirupati, India
2023-10-31
13 pages
Article/Chapter (Book)
Electronic Resource
English
Performance of Stone Columns in Multi-Layered Soils System
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